got around to installing my magnaflow muffler today

got it about 6 months old from a buddy with an 03 ctd

its a 5x9 inch oval, 14 inch, 4 inch straight through race version

i lengthened the downward section of the factory pipe to make up the difference in the offset from the factory muff and welded in new pipe in front of the magnaflow, i kept my factory tailpipe and the ss tip i welded on last year

http://www.sendpix.com/albums/06071816/jz0xc2p7am/

i haven't had it out on the road yet as it is raining like a cow pis... on a flat rock here

in the driveway it definitely has a deeper throb to it and sounds like there is a real motor under the hood

i was hoping to get my AEM installed today also but UPS only had the new cell phone on board today oh well maybe tomorrow

 

If you think it sounds good in the driveway it will sound great on the road . That airbox will complement the muffler nicely

 

I love the magnaflow since i tow alot now, if i didnt id be going back to the straight pipes though

 

straight pipes wouldn't make the wife happy

better performance but unhappy kids and wife are a bad combo

 

is it better performance with a 4" straight pipe new catback, or simply removing the stock muffler replacing it with a piece of pipe.

 

i am not the guru of exhaust systems, but since our diesels don't need backpressure i would imagine a straight pipe would be better, but the magnaflow can't possible flow much less air than a straight pipe

it was attached to an old exhaust when i picked it up, i assumed it had fish mouth holes in it, after i got the old exhaust off i discovered it is a straight pipe with 1/8" or less perforations in it, basically a straight pipe

if i removed the kitty it might be better but we have emmission checks in colorado and i tow in CA once in a while so i am going to leave it

i would bet you couldn't tell the difference on a dyno or in elapsed times

 

Since the '04.5+ trucks have a nicely bent stainless steel 4" exhaust already, IMO you are wasting money getting a full catback unless you need 5". Just straight pipe that muffler and go!

 

drove it today even got the chance to tow about 5k lbs with it

nice rumble at take off from the lite, nice tone when downshifting on the hwy

almost invisible at 65 in od

love it so far, just exactly what i was looking for, sounds like i modified the truck without destroying the quiet ride i like on the hwy